WATCHES: Tornado Watch Number 133

WWUS20 KWNS 131728
SEL3
SPC WW 131728
TXZ000-140000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 133
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM CDT FRI APR 13 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHWEST TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
700 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 70 MILES WEST SOUTHWEST OF
BROWNWOOD TEXAS TO 20 MILES WEST NORTHWEST OF WICHITA FALLS
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

DISCUSSION...SCATTERED THUNDERSTORMS WILL DEVELOP EARLY THIS
AFTERNOON ALONG DRYLINE WEST OF ABI-SJT. THESE STORMS WILL MOVE
EASTWARD INTO AN INCREASINGLY MOIST AND UNSTABLE AIR MASS. BACKED
LOW LEVEL WINDS AND OBSERVED VERTICAL SHEAR PROFILES APPEAR VERY
FAVORABLE FOR SUPERCELLS CAPABLE OF TORNADOES...AS WELL AS VERY
LARGE HAIL AND DAMAGING WINDS. STRONG TORNADOES ARE POSSIBLE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25035.

..HART

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